Need of Changing Parameters in Function Module

Question

Hi All,
Why we need sepearte Import and Export parameters in Function Module if the Changing Parameters
acts as both import and export parameters.
What is the use of using Changing Parametrs in Function Module.
Thanks in advance.
Sundaresan

Answer 1

Hi,
EXPORT PARAMETERS: When u r passing some value to the function, and the parameter will not be changed in the function, we use export parameter. Example: u pass parameter (a : 10) to a function, even after the function has been executed, value of a will be 10 only.
IMPORT PARAMETER: When u require some value back from the function. u do not provide any initial value to the function. Example : u pass a parameter (b: <blank>) to the function, function returns the same import parameter as (b : 20).
CHANGING PARAMETER: When u pass some value to the function and that function may change that value inside function, then changing parameters are used. Example: u pass parameter ( c: 30) to the function as changing parameter and function modifies this variable and return ( c: 50).
Reward points if helpful.
Thanks & Regards
- Rishika Bawa